Big Cottonwood Canyon is the ride you do when you have half a day in Salt Lake City and no interest in freeway miles. The byway is 15 miles (24 km) of SR-190 from the canyon mouth to Brighton at the head, and the Forest Service suggests allowing about an hour and a quarter for it. Ride it to the top and you can carry on over Guardsman Pass at 9,717 ft (2,962 m) and drop into Park City, which turns a short canyon run into a proper loop. The catch is the season: UDOT closes Guardsman Pass through the winter, typically November until May or June.
The ride in one paragraph
The canyon narrows almost immediately after the mouth, which is what makes it feel so much bigger than 15 miles. You go from suburban Salt Lake valley to sheer rock walls in under two minutes of riding. The road climbs steadily, following the creek, through a sequence of tight lower curves and then longer sweepers as the canyon opens near the top. Near the head sit Solitude and Brighton, two four-season resorts, and Silver Lake with its visitor centre. It is not a technical challenge and it is not remote. It is a fast, dense, high-quality piece of mountain road that starts twenty minutes from downtown, which is a rarer thing than a difficult one.
Route at a glance
| Byway length | 15 miles (24 km) on SR-190, canyon mouth to Brighton |
| Time to allow | About 1 hour 15 minutes for the byway alone |
| Guardsman Pass | 9,717 ft (2,962 m), SR-190 and SR-224 over to Park City |
| Pass season | Closed through winter, typically November to May or June |
| Canyon season | SR-190 to Brighton stays open year-round |
| Access | From I-215 on the east side of the Salt Lake valley |
| Entry | No timed entry or reservation for the byway |
Open the canyon and Guardsman Pass loop in Google Maps and send it to your navigation before you start climbing — the upper canyon and the pass are patchy for signal.
The lower canyon
From the mouth, SR-190 runs hard against the creek with rock on both sides. This lower section is where the traffic is worst and where the surface changes most from year to year, because it takes the brunt of the winter. Rockfall debris on the inside of corners after a wet spring is common enough that riders treat every blind left-hander as potentially dirty.
Storm Mountain and the climbing areas along here mean parked cars on narrow shoulders and people crossing the road with gear. Speed limits are low and enforced, and the canyon has a lot of cyclists on weekend mornings. None of this ruins the ride, but it does mean the lower third is not the place to make time.
The upper canyon and Brighton
Higher up the walls step back, the valley widens into meadow and aspen, and the road settles into a rhythm of longer curves. Solitude is signed first, then Brighton at the very top where the road loops around the resort base. Silver Lake sits just off the road with a boardwalk and visitor centre, and it is the easiest stop on the byway for a rider — proper parking, shade, water.
Autumn is the standout season here. The aspen stands around Brighton turn in late September and early October, and because the whole canyon is only 15 miles long, you can ride up, look at it, and be back in the valley inside two hours.
Guardsman Pass, the part worth planning around
The dead-end version of Big Cottonwood is fine. The loop version is much better. From Brighton, SR-190 continues over Guardsman Pass at 9,717 ft (2,962 m) and becomes SR-224 on the descent to Park City. From there you can drop down Parleys Canyon on I-80 back to Salt Lake City and close the circle in an afternoon.
The pass road is narrow, steep and switchbacked, with sections that feel more like a forest road than a state highway. It is paved, but it is not a fast road and it is not a road to be on in poor visibility. There are no services between Brighton and Park City.
Season is the whole story. UDOT lists both SR-190 Guardsman Pass, Brighton to Park City, and SR-224 Guardsman Pass, Park City to Brighton, among the state roads it closes through the winter, typically November through May or June depending on snow. Verified against UDOT's seasonal roads page in August 2026. The same list includes SR-92 through American Fork Canyon and the Alpine Loop, and SR-150, the Mirror Lake Highway — the other two big seasonal rides out of the Salt Lake area — so a single check tells you what is open across the region.
Where the canyon fits in a Salt Lake week
Big Cottonwood is the shortest of the good rides out of Salt Lake City, which makes it the one you slot around other plans rather than build a day around. A common pattern is canyon and pass in the morning, Park City for lunch, I-80 home by early afternoon. That leaves the rest of the day free and still gives you a summit above 9,700 ft.
If you have longer, the region's other seasonal roads sit on the same UDOT closure list and open at roughly the same time of year. SR-92 through American Fork Canyon and over the Alpine Loop is the closest in character, tight and wooded with a high saddle in the middle. SR-150, the Mirror Lake Highway east of Kamas, is the opposite — long, open, high, and genuinely remote in places, and it needs a full day rather than a morning. Ride Big Cottonwood first if you are new to the area: it is the cheapest way to find out how your bike and your body handle Wasatch altitude before you commit to anything longer.
Season, weather and canyon rules
When to ride. Big Cottonwood itself, SR-190 up to Brighton, is a year-round road and gets plowed hard because the resorts depend on it. Guardsman Pass is the seasonal piece. In practice the loop works from around June to October, and the canyon alone works whenever the pavement is dry.
Winter traction law. If you were considering a cold-season canyon run, know what you are riding into. UDOT expanded the Cottonwood Canyons traction law under legislation passed in 2025, adding enforcement up to 24 hours before a storm arrives, a stricter Class Three designation for major storms, a minimum 5/32 inch tread requirement, and the ability for law enforcement to issue citations. That is a snow-tyre regime built for cars, and it tells you plainly what the canyon is like in winter.
Afternoon storms. Summer thunderstorms build over the Wasatch quickly and the canyon funnels wind. Morning rides are drier, quieter and cooler.
Altitude. Guardsman tops out near 9,700 ft (2,960 m) and you get there from a valley floor in well under an hour. That is a real change in air, and our guide to riding at high altitude covers what it does to you and to the bike.
Live conditions. Check UDOT's seasonal roads list for open and closed status, and UDOT Traffic for live cameras and incidents. Both are the authoritative sources for these roads.
Gear notes for a short canyon day
Two things catch riders out on rides this close to a city. The first is that a short route makes people skip preparation entirely — no check, no fuel stop, nothing in the pockets — and then the Guardsman descent into Park City turns a 30-mile plan into an 80-mile one. Running the basic pre-ride check takes two minutes and covers the things that actually strand people. The second is temperature and pressure: the valley floor in July can be 95°F while the pass is jacket weather, and that swing moves tyre pressure enough to notice in the corners — our tyre pressure guide explains the mechanism, and a Bluetooth TPMS sensor shows the number rather than leaving you to guess at the top. For navigation, load the loop before you leave the valley; a CarPlay riding system with offline maps holds the route through the dead patches on the pass. If you are building a longer trip around the region, our Denver and Salt Lake City day rides overview lays out how these canyons compare with the Colorado passes.
FAQ
Is Big Cottonwood Canyon open year-round?
SR-190 up to Brighton is maintained through winter for the ski resorts. Guardsman Pass, which continues over to Park City, closes for the winter and typically reopens in late spring.
When does Guardsman Pass open?
UDOT closes its seasonal roads typically from November through May or June, depending on the weather. Check the Forest Service byway page for the canyon and UDOT's seasonal roads list for the pass itself before you plan the loop.
How long does the loop take?
The byway alone is about an hour and a quarter of driving. Adding Guardsman Pass to Park City and returning via I-80 makes a comfortable half day with stops.
Is the road suitable for a big touring bike?
The canyon itself, easily. Guardsman Pass is narrow and steep with tight switchbacks and rough patches, which is manageable on a heavy bike but not relaxing. Riders on fully loaded tourers often turn around at Brighton.
What about Little Cottonwood Canyon?
It is the next canyon south, a separate byway, and it dead-ends at Alta and Snowbird with no pass at the top. Big Cottonwood is the one that connects through, which is why it makes the better motorcycle loop.
